Investigators aren’t sure if real bullets somehow got into the actor’s guns, or if it was shrapnel from blanks that wounded three spectators seriously enough to be taken to the hospital in ambulances.

One of the spectators remains hospitalized, listed in fair condition.

The Dakota Wild Bunch Reinactors, who stage gunfights in Hill City a few times a week during tourist season, aren’t talking to the press at this point, but announced on their Facebook page they would be suspending their re-enactments in light of the incident.